# Execution begins at address 0
.pos 0
    irmovq stack, %rsp  # Set up stack pointer
    call main           # Execute main program
    halt                # Terminate program

# Array of 4 elements
.pos 0x18
array:
    .quad 0xd000d000d000d
    .quad 0xc000c000c000c0
    .quad 0xb000b000b000b
    .quad 0xa000a000a000a

main:
    irmovq array, %rdi
    irmovq $4, %rsi
    call sum
    ret

# long sum(long *start, long count)
# start in %rdi, count in %rsi
sum:
    irmovq $8,%r8
    irmovq $1,%r9
    xorq %rax,%rax
    andq %rsi,%rsi
    jmp test
loop:
    mrmovq (%rdi),%r10
    addq %r10,%rax
    addq %r8,%rdi      # start++
    subq %r9,%rsi      # count--
                       # Set CC
test:
    jne loop           # Stop when 0
    ret                # Return

.pos 0x200
stack: